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Cheap flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport from £398

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/2. Fares are subject to change and may not be available on all flights or dates of travel.
STN — IAD
21 Feb — 28 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Stansted to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Stansted to Dulles Intl
Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2026.

Thu 5/206:30
STN
-
IAD
2 stops17h 00m
Multiple Airlines
Mon 9/219:40
IAD
-
STN
2 stops17h 40m
Multiple Airlines
Deal found 20/1£426
Mon 2/206:30
STN
-
IAD
2 stops17h 00m
Multiple Airlines
Thu 5/219:40
IAD
-
STN
2 stops15h 55m
Multiple Airlines
Deal found 20/1£430
Thu 26/206:30
STN
-
IAD
2 stops17h 00m
Multiple Airlines
Sun 1/319:40
IAD
-
STN
2 stops22h 20m
Multiple Airlines
Deal found 20/1£431
Sun 1/308:55
STN
-
IAD
2 stops35h 20m
Multiple Airlines
Tue 3/317:30
IAD
-
STN
2 stops25h 20m
Multiple Airlines
Deal found 20/1£441
Tue 24/217:00
STN
-
IAD
3 stops32h 54m
Multiple Airlines
Sat 28/220:30
IAD
-
STN
2 stops21h 55m
Multiple Airlines
Deal found 21/1£445
Thu 29/108:30
STN
-
IAD
1 stop12h 05m
Multiple Airlines
Wed 4/217:05
IAD
-
STN
1 stop11h 45m
Multiple Airlines
Deal found 20/1£447
Thu 12/314:35
STN
-
IAD
2 stops35h 25m
Multiple Airlines
Mon 23/320:40
IAD
-
STN
2 stops23h 15m
Multiple Airlines
Deal found 21/1£459
Wed 18/305:55
STN
-
IAD
2 stops20h 05m
Multiple Airlines
Sun 12/420:30
IAD
-
STN
2 stops21h 50m
Multiple Airlines
Deal found 21/1£462
Tue 10/320:25
STN
-
IAD
2 stops29h 35m
Multiple Airlines
Tue 14/420:30
IAD
-
STN
2 stops14h 30m
Multiple Airlines
Deal found 21/1£464
Thu 12/208:30
STN
-
IAD
2 stops15h 00m
Multiple Airlines
Mon 16/219:40
IAD
-
STN
2 stops13h 40m
Multiple Airlines
Deal found 21/1£467

Find flight deals from Stansted to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Stansted (STN) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 January 2026.

Round-trip from

£426

One-way from

£398

Popular in

July

Cheapest in

February

Average price

£472
5/2-9/2
  • 5/2-9/2
  • 4 total stops
  • 34h 40m total
  • London to Washington, D.C.
Search Deals
20/2
  • 20/2
  • 3 total stops
  • 50h 35m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Stansted to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 22 January 2026.
Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Stansted

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 26/2

06:30-18:30

2 stops17h 00m

Washington, D.C. Dulles Intl

Sun 1/3

19:40-23:00

2 stops22h 20m

£431

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 16/3

08:05-15:35

2 stops35h 30m

Washington, D.C. Dulles Intl

Fri 20/3

20:40-21:20

2 stops20h 40m

£490

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 18/2

06:30-18:45

2 stops17h 15m

Washington, D.C. Dulles Intl

Wed 25/2

20:45-18:10

2 stops16h 25m

£493

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 5/3

14:35-21:00

2 stops35h 25m

Washington, D.C. Dulles Intl

Tue 10/3

22:00-14:20

1 stop12h 20m

£501

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 12/5

18:55-15:05

2 stops25h 10m

Washington, D.C. Dulles Intl

Tue 19/5

21:05-21:20

1 stop19h 15m

£503

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 6/3

16:20-15:15

2 stops27h 55m

Washington, D.C. Dulles Intl

Fri 13/3

09:55-17:55

2 stops28h 00m

£503

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 29/4

08:20-20:35

2 stops17h 15m

Washington, D.C. Dulles Intl

Wed 13/5

17:15-22:05

2 stops23h 50m

£507

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 11/3

20:40-17:30

1 stop24h 50m

Washington, D.C. Dulles Intl

Tue 24/3

20:40-22:55

2 stops22h 15m

£530

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 13/4

05:50-15:30

1 stop14h 40m

Washington, D.C. Dulles Intl

Thu 16/4

20:30-22:35

2 stops21h 05m

£533

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 12/3

21:20-22:00

2 stops28h 40m

Washington, D.C. Dulles Intl

Sun 22/3

18:05-07:50

1 stop9h 45m

£535

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 21 results
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Best time to book a flight from Stansted to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stansted with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport

How often are flights from London to Washington, D.C. delayed?

About 0% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 0 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Related info for your journey

Find useful and relevant information for your journey from Stansted to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Stansted to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Stansted to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Dulles Intl.

  • Can I find deals for business class flights from Stansted to Dulles Intl?

    Yes. Cheapflights offers flight deals from Stansted to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park

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Why should you use Cheapflights to find cheap flight tickets from Stansted to Dulles Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dulles Intl from Stansted.

Can Cheapflights find flights from Stansted to Dulles Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Stansted to Dulles Intl flexibly with Cheapflights today.

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